BRISTOL // A car running on human waste has been test driven on the streets of a British city. And despite its unpleasant fuel it does not smell unpleasant. The Bio-Bug runs on processed methane gas generated as part of the raw sewage treatment process. Wessex Water estimate the waste flushed down the toilets of 70 homes is enough to power the Bio-Bug for a year, based on an annual mileage of 16,100 km. With support from the South West Regional Development Agency, GENeco, a Wessex Water-owned company, imported special equipment to treat gas generated at Bristol sewage treatment works in Avonmouth with the aim to power a VW Beetle in a way that would not affect its performance. Mohammed Saddiq, GENeco's general manager, said he was confident that methane from sewage sludge could be used as an alternative energy source and was an innovative way of powering company vehicles. "If you were to drive the car you wouldn't know it was powered by biogas as it performs just like any conventional car. It is probably the most sustainable car around."